25232281 has 4 divisors (see below), whose sum is σ = 25318692. Its totient is φ = 25145872.

The previous prime is 25232257. The next prime is 25232287. The reversal of 25232281 is 18223252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9865881 + 15366400 = 3141^2 + 3920^2 .

It is a cyclic number.

It is not a de Polignac number, because 25232281 - 2⁷ = 25232153 is a prime.

It is a super-2 number, since 2×25232281² = 1273336008925922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25232287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42766 + ... + 43351.

It is an arithmetic number, because the mean of its divisors is an integer number (6329673).

Almost surely, 2^25232281 is an apocalyptic number.

It is an amenable number.

25232281 is a deficient number, since it is larger than the sum of its proper divisors (86411).

25232281 is an equidigital number, since it uses as much as digits as its factorization.

25232281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86410.

The product of its digits is 1920, while the sum is 25.

The square root of 25232281 is about 5023.1743947428. The cubic root of 25232281 is about 293.3045752052.

The spelling of 25232281 in words is "twenty-five million, two hundred thirty-two thousand, two hundred eighty-one".